WordPress/wp-includes/template-functions-category.php

367 lines
11 KiB
PHP

<?php
function walk_category_tree() {
$walker = new Walker_Category;
$args = func_get_args();
return call_user_func_array(array(&$walker, 'walk'), $args);
}
function walk_category_dropdown_tree() {
$walker = new Walker_CategoryDropdown;
$args = func_get_args();
return call_user_func_array(array(&$walker, 'walk'), $args);
}
function get_the_category($id = false) {
global $post, $category_cache;
if ( !$id )
$id = $post->ID;
if ( !isset($category_cache[$id]) )
update_post_category_cache($id);
$categories = $category_cache[$id];
if ( !empty($categories) )
sort($categories);
else
$categories = array();
return $categories;
}
function get_category_link($category_id) {
global $wp_rewrite;
$catlink = $wp_rewrite->get_category_permastruct();
if ( empty($catlink) ) {
$file = get_settings('home') . '/';
$catlink = $file . '?cat=' . $category_id;
} else {
$category = &get_category($category_id);
$category_nicename = $category->category_nicename;
if ( $parent = $category->category_parent )
$category_nicename = get_category_parents($parent, false, '/', true) . $category_nicename . '/';
$catlink = str_replace('%category%', $category_nicename, $catlink);
$catlink = get_settings('home') . trailingslashit($catlink);
}
return apply_filters('category_link', $catlink, $category_id);
}
function get_the_category_list($separator = '', $parents='') {
$categories = get_the_category();
if (empty($categories))
return apply_filters('the_category', __('Uncategorized'), $separator, $parents);
$thelist = '';
if ( '' == $separator ) {
$thelist .= '<ul class="post-categories">';
foreach ( $categories as $category ) {
$thelist .= "\n\t<li>";
switch ( strtolower($parents) ) {
case 'multiple':
if ($category->category_parent)
$thelist .= get_category_parents($category->category_parent, TRUE);
$thelist .= '<a href="' . get_category_link($category->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $category->cat_name) . '" rel="category tag">'.$category->cat_name.'</a></li>';
break;
case 'single':
$thelist .= '<a href="' . get_category_link($category->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $category->cat_name) . ' rel="category tag">';
if ($category->category_parent)
$thelist .= get_category_parents($category->category_parent, FALSE);
$thelist .= $category->cat_name.'</a></li>';
break;
case '':
default:
$thelist .= '<a href="' . get_category_link($category->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $category->cat_name) . '" rel="category tag">'.$category->cat_name.'</a></li>';
}
}
$thelist .= '</ul>';
} else {
$i = 0;
foreach ( $categories as $category ) {
if ( 0 < $i )
$thelist .= $separator . ' ';
switch ( strtolower($parents) ) {
case 'multiple':
if ( $category->category_parent )
$thelist .= get_category_parents($category->category_parent, TRUE);
$thelist .= '<a href="' . get_category_link($category->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $category->cat_name) . '" rel="category tag">'.$category->cat_name.'</a>';
break;
case 'single':
$thelist .= '<a href="' . get_category_link($category->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $category->cat_name) . '" rel="category tag">';
if ( $category->category_parent )
$thelist .= get_category_parents($category->category_parent, FALSE);
$thelist .= "$category->cat_name</a>";
break;
case '':
default:
$thelist .= '<a href="' . get_category_link($category->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $category->cat_name) . '" rel="category tag">'.$category->cat_name.'</a>';
}
++$i;
}
}
return apply_filters('the_category', $thelist, $separator, $parents);
}
function the_category($separator = '', $parents='') {
echo get_the_category_list($separator, $parents);
}
function get_the_category_by_ID($cat_ID) {
$cat_ID = (int) $cat_ID;
$category = &get_category($cat_ID);
return $category->cat_name;
}
function get_category_parents($id, $link = FALSE, $separator = '/', $nicename = FALSE){
$chain = '';
$parent = &get_category($id);
if ( $nicename )
$name = $parent->category_nicename;
else
$name = $parent->cat_name;
if ( $parent->category_parent )
$chain .= get_category_parents($parent->category_parent, $link, $separator, $nicename);
if ( $link )
$chain .= '<a href="' . get_category_link($parent->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $parent->cat_name) . '">'.$name.'</a>' . $separator;
else
$chain .= $name.$separator;
return $chain;
}
function get_category_children($id, $before = '/', $after = '') {
if ( 0 == $id )
return '';
$cat_ids = get_all_category_ids();
foreach ( $cat_ids as $cat_id ) {
if ( $cat_id == $id)
continue;
$category = get_category($cat_id);
if ( $category->category_parent == $id ) {
$chain .= $before.$category->cat_ID.$after;
$chain .= get_category_children($category->cat_ID, $before, $after);
}
}
return $chain;
}
function category_description($category = 0) {
global $cat;
if ( !$category )
$category = $cat;
$category = & get_category($category);
return apply_filters('category_description', $category->category_description, $category->cat_ID);
}
function wp_dropdown_categories($args = '') {
if ( is_array($args) )
$r = &$args;
else
parse_str($args, $r);
$defaults = array('show_option_all' => '', 'show_option_none' => '', 'orderby' => 'ID',
'order' => 'ASC', 'show_last_update' => 0, 'show_count' => 0,
'hide_empty' => 1, 'child_of' => 0, 'exclude' => '', 'echo' => 1,
'selected' => 0, 'hierarchical' => 0, 'name' => 'cat',
'class' => 'postform');
$r = array_merge($defaults, $r);
$r['include_last_update_time'] = $r['show_last_update'];
extract($r);
$categories = get_categories($r);
$output = '';
if ( ! empty($categories) ) {
$output = "<select name='$name' class='$class'>\n";
if ( $show_option_all ) {
$show_option_all = apply_filters('list_cats', $show_option_all);
$output .= "\t<option value='0'>$show_option_all</option>\n";
}
if ( $show_option_none) {
$show_option_none = apply_filters('list_cats', $show_option_none);
$output .= "\t<option value='-1'>$show_option_none</option>\n";
}
if ( $hierarchical )
$depth = 0; // Walk the full depth.
else
$depth = -1; // Flat.
$output .= walk_category_dropdown_tree($categories, $depth, $r);
$output .= "</select>\n";
}
$output = apply_filters('wp_dropdown_cats', $output);
if ( $echo )
echo $output;
return $output;
}
function wp_list_categories($args = '') {
if ( is_array($args) )
$r = &$args;
else
parse_str($args, $r);
$defaults = array('show_option_all' => '', 'orderby' => 'ID',
'order' => 'asc', 'style' => 'list', 'show_last_update' => 0,
'show_count' => 0, 'hide_empty' => 1, 'use_desc_for_title' => 1,
'child_of' => 0, 'feed' => '', 'feed_image' => '', 'exclude' => '',
'hierarchical' => true, 'title_li' => '');
$r = array_merge($defaults, $r);
$r['include_last_update_time'] = $r['show_date'];
extract($r);
$categories = get_categories($r);
$output = '';
if ( $title_li && $list )
$output = '<li class="categories">' . $r['title_li'] . '<ul>';
if ( empty($categories) ) {
if ( $list)
$output .= '<li>' . __("No categories") . '</li>';
else
$output .= __("No categories");
} else {
global $wp_query;
$r['current_category'] = $wp_query->get_queried_object_id();
if ( $hierarchical )
$depth = 0; // Walk the full depth.
else
$depth = -1; // Flat.
$output .= walk_category_tree($categories, $depth, $r);
}
if ( $title_li && $list )
$output .= '</ul></li>';
echo apply_filters('list_cats', $output);
}
function in_category($category) { // Check if the current post is in the given category
global $category_cache, $post;
if ( isset( $category_cache[$post->ID][$category] ) )
return true;
else
return false;
}
function &_get_cat_children($category_id, $categories) {
if ( empty($categories) )
return array();
$category_list = array();
foreach ( $categories as $category ) {
if ( $category->category_parent == $category_id ) {
$category_list[] = $category;
if ( $children = _get_cat_children($category->cat_ID, $categories) )
$category_list = array_merge($category_list, $children);
}
}
return $category_list;
}
function &get_categories($args = '') {
global $wpdb, $category_links;
if ( is_array($args) )
$r = &$args;
else
parse_str($args, $r);
$defaults = array('type' => 'post', 'child_of' => 0, 'orderby' => 'name', 'order' => 'ASC',
'hide_empty' => true, 'include_last_update_time' => false, 'hierarchical' => 1, $exclude => '', $include => '');
$r = array_merge($defaults, $r);
$r['orderby'] = "cat_" . $r['orderby']; // restricts order by to cat_ID and cat_name fields
extract($r);
$where = 'cat_ID > 0';
$inclusions = '';
if ( !empty($include) ) {
$child_of = 0; //ignore child_of and exclude params if using include
$exclude = '';
$incategories = preg_split('/[\s,]+/',$include);
if ( count($incategories) ) {
foreach ( $incategories as $incat ) {
if (empty($inclusions))
$inclusions = ' AND ( cat_ID = ' . intval($incat) . ' ';
else
$inclusions .= ' OR cat_ID = ' . intval($incat) . ' ';
}
}
}
if (!empty($inclusions))
$inclusions .= ')';
$where .= $inclusions;
$exclusions = '';
if ( !empty($exclude) ) {
$excategories = preg_split('/[\s,]+/',$exclude);
if ( count($excategories) ) {
foreach ( $excategories as $excat ) {
if (empty($exclusions))
$exclusions = ' AND ( cat_ID <> ' . intval($excat) . ' ';
else
$exclusions .= ' AND cat_ID <> ' . intval($excat) . ' ';
// TODO: Exclude children of excluded cats? Note: children are getting excluded
}
}
}
if (!empty($exclusions))
$exclusions .= ')';
$exclusions = apply_filters('list_cats_exclusions', $exclusions );
$where .= $exclusions;
$having = '';
if ( $hide_empty ) {
if ( 'link' == $type )
$having = 'HAVING link_count > 0';
else
$having = 'HAVING category_count > 0';
}
$categories = $wpdb->get_results("SELECT * FROM $wpdb->categories WHERE $where $having ORDER BY $orderby $order");
if ( empty($categories) )
return array();
// TODO: Integrate this into the main query.
if ( $include_last_update_time ) {
$stamps = $wpdb->get_results("SELECT category_id, UNIX_TIMESTAMP( MAX(post_date) ) AS ts FROM $wpdb->posts, $wpdb->post2cat, $wpdb->categories
WHERE post_status = 'publish' AND post_id = ID AND $where GROUP BY category_id");
global $cat_stamps;
foreach ($stamps as $stamp)
$cat_stamps[$stamp->category_id] = $stamp->ts;
function stamp_cat($cat) {
global $cat_stamps;
$cat->last_update_timestamp = $cat_stamps[$cat->cat_ID];
return $cat;
}
$categories = array_map('stamp_cat', $categories);
unset($cat_stamps);
}
if ( $child_of || $hierarchical )
$categories = & _get_cat_children($child_of, $categories);
return apply_filters('get_categories', $categories);
}
?>